Snow tires work all year round and they are a wise investment considering the number of Subarus I see in the ditch every year. It’s anecdotal but just yesterday I drove into town on route 2 and on my way back a Subaru wagon was deep in the ditch. Not sure how since I’ve been doing 55 mph down that same stretch just a few minutes prior and had zero problems. My best guess is they didn’t have snow tires because I do and it’s not like I was going slow. My point is all wheel drive vehicles are not a substitute for snow tires if anything the owners seem to drive faster than the conditions permit because they feel invincible and when things go wrong they are traveling at a higher rate of speed which leads to worse outcomes that someone like me in a rwd car with snow tires. I get a little warning before things go wrong and can usually sort the car out and since I’m traveling at a lower and generally legal rate of speed if something does go wrong it’s not going to be as bad.